To be honest, I have a good time every time I drink alcohol. I am not going to deny or conceal that truth inspite of being a Police officer. At this period of time right now, especially in Chicago, the society is very unstable. Development of the society requires millions of men power, which drew people from all over the world into the United States. The charm of city was irresistible to everyone, for that reason, people flocked to into the city. Before prohibition was issued, I went to the bar every weekend with my friends, we would get couple drink, played some pool, told some dirty jokes until midnight. We had fun.

From the very beginning, criminals had recognised that Prohibition represented a marvellous business opportunity; in major cities, indeed, gangs had quietly been stockpiling booze supplies for weeks. Legend has it that the first gangster to grasp the real commercial potential of Prohibition, though, was racketeer Arnold Rothstein, whose agents had been responsible for rigging the baseball World Series in 1919. Establishing his "office" at Lindy's Restaurant in Midtown Manhattan, Rothstein brought alcohol across the Great Lakes and down the Hudson from Canada, and supplied it – at a handsome profit – to the city's gangsters.

In 1928, Rothstein was murdered after a gambling dispute, but by then his fame was such that F Scott Fitzgerald used him as the model for Jay Gatsby's friend Meyer Wolfsheim in The Great Gatsby, "small, flatnosed Jew" with cufflinks made from human teeth. Indeed, Gatsby himself – the quintessential self-made American hero – is alleged to have made his fortune from organised crime. "He and this Wolfsheim bought up a lot of side-street drug stores here and in Chicago and sold grain alcohol over the counter," says Tom Buchanan. "I picked him for a bootlegger the first time I saw him and I wasn't far wrong."

By far the most celebrated gangster of the day, though, was Al Capone, a New York-born hoodlum who controlled much of the Chicago underworld in the mid-1920s where he worked for Johnny Torrio the city's leading figure in the underworld. Capone was given the task of intimidating Torrio's rivals within the city so that they would give up and hand over to Torrio their territory. He has done so many killings, and he was very good at what he did, the police never caught him once. The reason is he managed to bribe both the police and the important politicians of Chicago. He spent $75 million on such ventures but considered it a good investment of his huge fortune. His armed thugs patrolled election booths to ensure that Capone's politicians were returned to office. The city's mayor after 1927 was Big Bill Thompson - one of Capone's men. After the prohibition was issued, lot of gang saw it was a good opportunity to get rich, Capone convinced or forced a lot of speakeasy operators to buy illegal alcohol from Torrio. In 1925, Torrio was nearly killed by a rival gang and he decided to get out of the criminal world while he was still alive. Torrio handed over to Capone his 'business'.

Living in splendour in the city's Lexington hotel, he was said to be raking in some $100m a year from casinos and speakeasies. To many people, he seemed a real-life Robin Hood, opening soup kitchens for the unemployed and giving large sums to charity. Unlike Sherwood Forest's finest, however, Capone had a pronounced taste for the good life, wearing smart suits and drinking expensive Templeton Rye whisky. "I'm just a businessman," he used to say, "giving the public what they want." But when, in 1929, Capone ordered the brutal machine-gunning of seven Chicago rivals in the Valentine's Day Massacre, public sympathy evaporated.

In this a little turbulent period of time, being a police is not an easy job. If you think we are decent people, I would say that statement is not complete ture. If you think we implement the prohibition law, arrest every moonshine makers, bootleggers, and illegal operators out there, then I would say you are wrong. There are so many of them, theses guys are well organized group, they have a huge sophisticated underground network. Like I said, the high-level officers in the police force all took the bribe from Al Capone, so certain places we are told not to get in, and certain people we cannot touch too. I have a family and friends, so I just do whatever chief told us to do.